Reversal method teaching tool of epicyclic gear train

Abstract

The invention discloses a reversal method teaching tool of an epicyclic gear train. The accuracy and the veracity of a reversal method formula are verified by measuring the rotating speeds generated before and after a reversal method is adopted, and meanwhile types of the epicyclic gear train can be converted. The teaching tool comprises a body demonstration part, a large sun gear and small sun gear driving device, a main shaft reversal driving device, a measured speed display device and a rack, wherein the body demonstration part and the large sun gear and small sun gear driving device are both installed on a main shaft, the main shaft rotates at the speed with the magnitude equal to and the direction opposite to those of a planet carrier, the epicyclic gear train is driven by the main shaft to reverse as a whole, and reversal method demonstration is achieved. According to the teaching tool, based on reversing of the main shaft, the structure is simplified, the manufacturing technology is simple, and the teaching tool is easy to obtain; the dynamic contact mode in which a carbon brush and a friction ring are combined is adopted for supplying power to a sun gear driving motor, and the problem that a motor lead is wound on the shaft is solved. The teaching tool is small in size as a whole, light in weight and convenient to operate and use in a classroom.

Description

Technical field [0001] The invention relates to the field of teaching instruments, in particular to a teaching aid for the epicyclic gear train reversal method. Background technique [0002] In the mechanical principle courses for mechanical majors and the basic mechanical design courses for near-mechanical majors, the "reversal method" of the epicyclic gear train has always been a difficult point in classroom teaching. The method is abstract and difficult to understand, and there is no corresponding teaching aids for classroom demonstrations. , So that students with poor spatial imagination skills cannot master this knowledge point. Even if they can understand the reversal method, many students have no definite verification of the authenticity and correctness of the calculation formula of the reversal method, and they always have doubts. [0003] Consult the patent literature, Chinese Patent Publication (Announcement) No. CN103824503A, which discloses an experimental device and me...

AI Technical Summary

Problems solved by technology

The problems of this device and method are: (1) the derivation of the calculation formula of the epicyclic gear train inversion method can be realized through multiple assembly and disassembly of the mechanism, and the inversion method demonstration effect is poor in intuition and operability; (2) the power adopts feet (3) Calculate the transmission ratio of the epicyclic gear train by measuring the number of rotation cycles of each component, resulting in non-real-time speed measurement; (4) Only one type of epicyclic gear train reversal method can be demonstrated; (5) Unable to achieve epicyclic gear train type conversion

Images